I tried to run gem.94 with pd 0.49  (for mac os 10.11 with intel core 2 duo) today. 

All objects has been fine recognized, but by opening the "gem-window" the system crash:

gemmacoswindow]: failed to init GLEW: your system only supports openGL-1.0

[gemmacoswindow]: unable to switch to current window (do you have one?), cannot render!

Thank you for any ideas,

EFA